Performances of simultaneous enhanced removal of nitrogen and phosphorus via biological aerated filter with biochar as fillers under low dissolved oxygen for digested swine wastewater treatment

Xin, Xin; Liu, Siqiang; Qin, Jiawei; Ye, Zhixiang; Liu, Wei; Fang, Shuhong; Yang, Jie

doi:10.1007/s00449-021-02557-z

Cited by 32 publications

(7 citation statements)

References 60 publications

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“…RBG‐13‐54‐9 , SC‐I‐84 , Candidatus Udaeobater , KD4‐96 , Subgroup‐6 , Rhodanobacter , Gemmatimonas , Subgroup‐7 , Sva0485 and MBNT15 were the dominant genus in each treatment, their relative abundances were all greater than 1%. Previous studies found that RBG‐13‐54‐9 was the dominant strain for denitrification (Xin et al, 2021). Compared with CK treatment (4.6%), the relative abundance of RBG‐13‐54‐9 was significantly reduced in C treatment (3.9%) ( p < 0.05), which may be the reason for the lower total nitrogen loss in C treatment.…”

Section: Results and Analysismentioning

confidence: 91%

Carbon‐iron coupling reduced N₂O emissions via promoting the conversion to N₂ in paddy soils

Gan

Zhao

et al. 2023

European J Soil Science

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The influence of redox reactions involving carbon‐iron coupling (organic carbon and iron oxides) on nitrous oxide (N2O) production in paddy soils remains poorly understood. In this study, two microcosm experiments were conducted to investigate the effects of carbon‐iron coupling on N2O emissions, and the underlying mechanisms were verified using quantitative denitrification functional genes (nirS, nirK, nosZI, and nosZII) and high‐throughput sequencing. The results showed that ferrihydrite (iron) significantly promoted N2O‐N emissions (P < 0.05) after adding ammonium nitrogen, while glucose (carbon) significantly inhibited N2O‐N emissions (P < 0.05). Carbon‐iron coupling significantly decreased N2O‐N emissions (P < 0.05) but did not affect soil total nitrogen loss and increased nitrogen (N2) emissions. After adding high concentrations of acetylene (10% C2H2), the N2O‐N emissions from carbon‐iron coupling treatment increased significantly from 6.4 mg N kg−1 to 11.9 mg N kg−1 (P < 0.05), which confirmed that the carbon‐iron coupling reduced the N2O emissions by promoting the conversion of N2O to N2. The mechanisms behind carbon‐iron coupling promoting complete denitrification and reducing N2O emissions were attributed to glucose promoting iron reduction and carbon‐iron coupling enhancing the abundance of nosZI (42.7%) and nosZII (16.6%).This article is protected by copyright. All rights reserved.

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Section: Results and Analysismentioning

confidence: 91%

Carbon‐iron coupling reduced N₂O emissions via promoting the conversion to N₂ in paddy soils

Gan

Zhao

et al. 2023

European J Soil Science

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“…At 85 kPa, the addition of organic matter had a negligible impact on Rhodanobacter abundance, whereas at 70 kPa, a significant increase was observed, confirming organic matter's stimulating effect on denitrification. Additionally, Chujaibacter, a well-known denitrifying bacterium [27], thrived under reduced pressure. Its abundance rose from less than 3% in S1 and S3 to 24.6% in S2 and 17.5% in S4 as the reactor pressure decreased, reinforcing the idea that decreased pressure accelerated nitrogen escape and bolstered the denitrification process.…”

Section: Variation Of Microbial Diversitymentioning

confidence: 99%

“…Certain bacterial genera, such as Micropepsacaea, Acidovorax, Stenotrophomonas, Nitrosomonas, and Nitrospira, are known for their denitrification and nitrification capabilities [27,28]. The abundance of these bacteria either decreased or remained relatively stable with a decreasing air pressure and the introduction of COD.…”

Section: Variation Of Microbial Diversitymentioning

confidence: 99%

“…These findings confirm that specific low-pressure and organic conditions can enhance the denitrification process, altering the proportion of nitrate metabolic pathways and potentially inhibiting the expansion of filamentous bacteria in the sludge system. Certain bacterial genera, such as Micropepsacaea, Acidovorax, Stenotrophomonas, Nitrosomonas, and Nitrospira, are known for their denitrification and nitrification capabilities [27,28]. The abundance of these bacteria either decreased or remained relatively stable with a decreasing air pressure and the introduction of COD.…”

Section: Variation Of Microbial Diversitymentioning

confidence: 99%

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The Influence of Atmospheric Pressure and Organic Loading on the Sustainability of Simultaneous Nitrification and Denitrification

Yu,

Sun,

Zhang

et al. 2023

Sustainability

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In high-altitude regions, a diminished atmospheric oxygen content significantly impairs the aeration efficiency of municipal wastewater, posing a challenge to sustainable wastewater management. Consequently, conventional biological wastewater treatment methods necessitate elevated energy consumption in high-altitude areas, rendering them economically and environmentally unsustainable. The simultaneous nitrification and denitrification (SND) process, owing to its minimal oxygen requirements, emerges as a promising and sustainable solution in low-pressure environments. Additionally, owing to the unique lifestyle and natural conditions in plateau regions, the organic loading in municipal wastewater is often low. To comprehensively assess the impact of low pressure and organic loading on the SND process, three laboratory-scale reactors were implemented. This study revealed that low pressure and the introduction of organic matter enhanced both nitrogen removal performance and SND efficiency. The sludge volume index decreased by 93.5%, indicating a substantial improvement in the microbial aggregation ability and the formation of a more favorable SND sludge structure. 16S rRNA sequencing results demonstrated alterations in the microbial community structure due to low pressure and the addition of organic matter, leading to a substantial increase in the abundance of nitrifying and denitrifying bacteria. Furthermore, the prediction results of functional genes indicated the upregulation of genes related to the nitrification and denitrification processes with decreasing pressure and the addition of organic matter. This enhancement underlines the improved microbial nitrogen removal function. This study underscores the positive influence of low pressure and organic loading on the SND system, thereby substantially enhancing the economic and environmental sustainability of the SND process in plateau regions.

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“…The increase in Comamonadaceae levels in the aerobic zone of the piggery's wastewater treatment system observed in this study confirmed this conclusion. Wang et al and Xin et al used metagenomic studies to show that Rhodophyta plays a leading role in denitrification in wastewater treatment systems [40,41]; different genera of Rhodocyclaceae have special treatment functions. For example, the studies of McIlroy et al and Li et al showed that Rhodocyclaceae appears alternately in the enhanced biological phosphorus removal (EBPR) bioreactor under anaerobic and aerobic conditions to enhance the phosphorus removal effect [42,43].…”

Section: Bacterial Community Structure Among the Biological Treatment Systemsmentioning

confidence: 99%

Bacterial Community Structure and Dynamic Changes in Different Functional Areas of a Piggery Wastewater Treatment System

Shi

Liu

et al. 2021

Microorganisms

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Chemicals of emerging concern (CEC) in pig farm breeding wastewater, such as antibiotics, will soon pose a serious threat to public health. It is therefore essential to consider improving the treatment efficiency of piggery wastewater in terms of microorganisms. In order to optimize the overall piggery wastewater treatment system from the perspective of the bacterial community structure and its response to environmental factors, five samples were randomly taken from each area of a piggery’s wastewater treatment system using a random sampling method. The bacterial communities’ composition and their correlation with wastewater quality were then analyzed using Illumina MiSeq high-throughput sequencing. The results showed that the bacterial community composition of each treatment unit was similar. However, differences in abundance were significant, and the bacterial community structure gradually changed with the process. Proteobacteria showed more adaptability to an anaerobic environment than Firmicutes, and the abundance of Tissierella in anaerobic zones was low. The abundance of Clostridial (39.02%) and Bacteroides (20.6%) in the inlet was significantly higher than it was in the aerobic zone and the anoxic zone (p < 0.05). Rhodocyclaceae is a key functional microbial group in a wastewater treatment system, and it is a dominant microbial group in activated sludge. Redundancy analysis (RDA) showed that chemical oxygen demand (COD) had the greatest impact on bacterial community structure. Total phosphorus (TP), total nitrogen (TN), PH and COD contents were significantly negatively correlated with Sphingobacteriia, Betaproteobacteria and Gammaproteobacteria, and significantly positively correlated with Bacteroidia and Clostridia. These results offer basic data and theoretical support for optimizing livestock wastewater treatment systems using bacterial community structures.

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Performances of simultaneous enhanced removal of nitrogen and phosphorus via biological aerated filter with biochar as fillers under low dissolved oxygen for digested swine wastewater treatment

Cited by 32 publications

References 60 publications

Carbon‐iron coupling reduced N₂O emissions via promoting the conversion to N₂ in paddy soils

Carbon‐iron coupling reduced N₂O emissions via promoting the conversion to N₂ in paddy soils

The Influence of Atmospheric Pressure and Organic Loading on the Sustainability of Simultaneous Nitrification and Denitrification

Bacterial Community Structure and Dynamic Changes in Different Functional Areas of a Piggery Wastewater Treatment System

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Performances of simultaneous enhanced removal of nitrogen and phosphorus via biological aerated filter with biochar as fillers under low dissolved oxygen for digested swine wastewater treatment

Cited by 32 publications

References 60 publications

Carbon‐iron coupling reduced N2O emissions via promoting the conversion to N2 in paddy soils

Carbon‐iron coupling reduced N2O emissions via promoting the conversion to N2 in paddy soils

The Influence of Atmospheric Pressure and Organic Loading on the Sustainability of Simultaneous Nitrification and Denitrification

Bacterial Community Structure and Dynamic Changes in Different Functional Areas of a Piggery Wastewater Treatment System

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Product

Resources

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Carbon‐iron coupling reduced N₂O emissions via promoting the conversion to N₂ in paddy soils

Carbon‐iron coupling reduced N₂O emissions via promoting the conversion to N₂ in paddy soils